Advisory Published

USN-4187-1: Linux kernel vulnerability

First published: Wed Nov 13 2019(Updated: )

Stephan van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel processors using Transactional Synchronization Extensions (TSX) could expose memory contents previously stored in microarchitectural buffers to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-server<3.13.0.175.186
3.13.0.175.186
=14.04
All of
ubuntu/linux-image-3.13.0-175-generic<3.13.0-175.226
3.13.0-175.226
=14.04
All of
ubuntu/linux-image-3.13.0-175-lowlatency<3.13.0-175.226
3.13.0-175.226
=14.04
All of
ubuntu/linux-image-virtual<3.13.0.175.186
3.13.0.175.186
=14.04
All of
ubuntu/linux-image-3.13.0-175-generic-lpae<3.13.0-175.226
3.13.0-175.226
=14.04
All of
ubuntu/linux-image-generic<3.13.0.175.186
3.13.0.175.186
=14.04
All of
ubuntu/linux-image-generic-lpae<3.13.0.175.186
3.13.0.175.186
=14.04
All of
ubuntu/linux-image-lowlatency<3.13.0.175.186
3.13.0.175.186
=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID of USN-4187-1?

    The vulnerability ID of USN-4187-1 is CVE-2019-11135.

  • How severe is the USN-4187-1 vulnerability?

    The severity of the USN-4187-1 vulnerability is not specified.

  • What software versions are affected by USN-4187-1?

    The affected software versions are Linux kernels 3.13.0.175.186, 3.13.0-175.226, and 3.13.0.175.186.

  • How do I fix the USN-4187-1 vulnerability?

    To fix the USN-4187-1 vulnerability, update your Linux kernel to version 3.13.0.175.186 or later.

  • Where can I find more information about USN-4187-1?

    You can find more information about USN-4187-1 on the Ubuntu Security Notices page.

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